---_________ do you play computer games? --- Once a week.
| A．How soon | B．How far | C．How long | D．How often |
Mary with her sisters ________ Chinese in China.
| A．are studying | B．have studied | C．is studying | D．study |
Students should do everything they can ________ their study.
| A．improve | B．to improve | C．improving | D．improved |
—I don’t know if Dr. White _______ to the party next week?
—I think he will come if he ________ free.
| A．comes; will be | B．will come; will be | C．comes; is | D．will come; is |
Shanghai is _______ one of the two cities.
| A．the larger | B．larger | C．the largest | D．largest |
Sixteen-year-olds shouldn’t be allowed to get their ears__________.
| A．to pierce | B．pierced | C．piercing | D．pierce |